Correlating Radio Link Failure and Minimization of Drive Test Reports

1. A method, comprising: collecting, by a core network element, a plurality of anonymous radio failure reports, wherein each radio failure report comprises a cell radio network temporary identifier of a corresponding user equipment and a timestamp corresponding to a time when a reported event of the radio failure report occurred; collecting a plurality of private data reports, each comprising a cell radio network temporary identifier of a corresponding user equipment, wherein first trace jobs for collecting the plurality of private data reports are separate from second trace jobs for collecting the radio failure reports, making the radio failure reports and private data reports separate and initially unassociated upon reception; and determining which radio failure report and private data report from the plurality of radio failure reports and private data reports are from a same user equipment based on the received cell radio network temporary identifiers and the timestamps; wherein the cell radio network temporary identifier is a last cell radio network temporary identifier before the time when the reported event of the radio failure report occurred.

2. The method of claim 1 , wherein the radio failure reports comprise at least one of radio link failure reports, handover failure reports, or radio resource control connection establishment failure reports.

3. The method of claim 1 , wherein the private data reports comprise at least one of minimization of drive test reports or measurement logs.

4. The method of claim 1 , wherein the collecting the plurality of radio failure reports comprises adding to a log file at least one of a user equipment identifier or a cell radio network temporary identifier.

5. The method of claim 1 , wherein the collecting the plurality of private data reports comprises adding at least one cell radio network temporary identifier or at least one user equipment identifier to a log file.

6. A method, comprising: providing, by a user equipment, a radio failure report to a core network element wherein the radio failure report comprises a cell radio network temporary identifier of the user equipment and a timestamp corresponding to a time when a reported event of the radio failure report occurred, wherein the radio failure report comprises a cell radio network temporary identifier of the user equipment and a timestamp corresponding to a time when a reported event of the radio failure report occurred; providing a private data report to the core network element, the private data report comprising a cell radio network temporary identifier of the user equipment, wherein the radio failure report and the private data report are configured to be correlated with one another at the core network element in order to determine which radio failure report and private data report from the plurality of radio failure reports and private data reports are from a same user equipment based on the received cell radio network temporary identifiers and the timestamps, wherein the radio failure report and the private data report are collected in separate trace jobs, making the radio failure reports and private data reports separate and initially unassociated upon reception at the core network element; wherein the cell radio network temporary identifier is a last cell radio network temporary identifier before the time when the reported event of the radio failure report occurred.

7. The method of claim 6 , wherein the providing the radio failure report comprises providing a user equipment identifier, the user equipment identifier corresponding to the time when the reported event of the radio failure report occurred.

8. The method of claim 6 , wherein the radio failure report comprises at least one of a radio link failure report, a handover failure report, or a radio resource control connection establishment failure report.

9. An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to collect, by a core network element, a plurality of a-anonymous radio failure reports˜wherein each radio failure report comprises a cell radio network temporary identifier of a corresponding user equipment and a timestamp corresponding to a time when a reported event of the radio failure report occurred; collect a plurality of private data reports, each comprising a cell radio network temporary identifier of a corresponding user equipment, wherein first trace jobs for collecting the plurality of private data reports are separate from second trace jobs for collecting the radio failure reports, making the radio failure reports and private data reports separate and initially unassociated upon reception; and determine which radio failure report and private data report from the plurality of radio failure reports and private data reports are from a same user equipment based on the received cell radio network temporary identifiers and the timestamps; wherein the cell radio network temporary identifier is a last cell radio network temporary identifier before the time when the reported event of the radio failure report occurred.

10. The apparatus of claim 9 , wherein the radio failure reports comprise at least one of radio link failure reports, handover failure reports, or radio resource control connection establishment failure reports.

11. The apparatus of claim 9 , wherein the private data reports comprise at least one of minimization of drive test reports or measurement logs.

12. The apparatus of claim 9 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to collect the plurality of radio failure reports by adding to a log file at least one of a user equipment identifier or a cell radio network temporary identifier.

13. The apparatus of claim 9 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to collect the plurality of private data reports by adding at least one cell radio network temporary identifier or at least one user equipment identifier to a log file.

14. An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to provide, by a user equipment, a radio failure report to a core network element; provide a private data report to the core network element, the private data report comprising a cell radio network temporary identifier of the user equipment, wherein the radio failure report and the private data report are configured to be correlated with one another at the core network element in order to determine which radio failure report and private data report from the plurality of radio failure reports and private data reports are from a same user equipment based on the received cell radio network temporary identifiers and the timestamps, wherein the radio failure report and the private data report are collected in separate trace jobs, making the radio failure reports and private data reports separate and initially unassociated upon reception at the core network element; wherein the cell radio network temporary identifier is a last cell radio network temporary identifier before the time when the reported event of the radio failure report occurred.

15. The apparatus of claim 14 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to provide the radio failure report by providing a user equipment identifier, the user equipment identifier corresponding to the time when the reported event of the radio failure report occurred.

16. The apparatus of claim 14 , wherein the radio failure report comprises at least one of a radio link failure report, a handover failure report, or a radio resource control connection establishment failure report.

17. The method of claim 1 , wherein the private data reports comprise reports that require user consent before data collection or use.

18. The method of claim 1 , wherein the correlating comprises correlating the at least one of the radio failure reports to the at least one of the private data reports based on identification information of corresponding user equipment and/or time of an associated radio link failure event.

19. The method of claim 1 , wherein the correlating comprises matching at least one of the at least one of the radio failure reports to at least one of the at least one of the private data reports, as corresponding to a same event.